Guardian Event Classifications
For Guardian Live Release Version 15, we will be updating the analyst classification definitions for fatigue, distraction and field of view exception events.
The refined definitions will enable us to best align with the current science and safety of fatigue and distraction and ensure consistency at scale. This will apply to all generations of our technology.
These changes are part of a broader initiative to deliver consistent and timely event confirmation and fatigue intervention. This initiative includes additional training and upgrading our analyst monitoring software.
Fatigue Events
Fatigue events will be confirmed as microsleep, drowsiness, yawning or marked as criteria not met. A standard duration threshold of 1.5 seconds will be set for the detection of a microsleep in drivers. This provides a balance between detecting safety critical events, whilst ignoring frequent non-microsleep related behaviours whilst driving.
Key indicators of microsleeping include uncontrolled eye closure, eye rolls, long eye closures, and head bobs, and/or where the driver has lost control of their neck muscles. In addition, the driver does not show signs of intentional eye closure such as squinting, speaking, laughing, glancing down or yawning.
Examples of drowsiness can include the driver’s eyes appear heavy, the driver’s eye closures are much slower or more frequent, the driver is struggling to remain attentive to the road and the driver’s face and/or body are considerably relaxed.
Distraction Events
Distraction events will be confirmed by the analyst as either a long glance away, mobile device, other distraction or criteria not met. The threshold for a distraction event in a driver is 4 seconds. A threshold of 4 seconds strikes a balance between safety and driver experience, and targets distracted behaviour that is more likely non-driving related.
‘Other distraction’ is defined as events where the driver is undertaking an activity where it is clear they do not have full control of the vehicle, that is not a long glance away or a visible mobile device. Examples can include a medical emergency, both hands are off the wheel, interference from another vehicle occupant or a potentially dangerous object.
A mobile device is only confirmed when a driver is clearly seen by an analyst handling a portable electronic device.
Field of View (FOV) Exception
FOV exception events will be confirmed by the analyst as either the camera misaligned, sensor covered, other tracking issues or criteria not met.
Camera misaligned is where the camera is not in the correct position to detect the face of the driver. It may be too high, too low or pointing to the left or right of the driver.
Sensor covered is where the camera has been covered or obscured. Examples include images being blacked out due to an item being placed in front of the camera.
Other tracking issues can include where the camera is out of focus, the operator is out of position, eyewear interference, facial features obscured, or a dark image.
Disclaimer: These Guardian Event classifications for drivers are correct as [24 September 2024] Seeing Machines reserves the right to update them from time to time. All threshold times are Seeing Machine’s standard threshold times and may vary depending on the customer and use case.
